Chemical engineering . Witkowitz. Thiscoke oven gas motor operatesa 150-kw. three-phase genera-tor by direct connection at aspeed of 160 r. p. m. The gasengine was constructed byBreitfeld, Danek & Co., ofPrag-Karolinenthel, Austria,Hungary, and the three-phasealternator by Ganz & Co., ofBudapest-Leubersdorfs, the fre-quency being 50 periods persecond, and the pressure 575volts. The earlier electric stationsoperated by gas engines sup-plied with producer gas werenot of the direct-connected type,but were belted to the dynamos as at tlie gas engine electricpower plant at Uster, near Zurich, Switz
Chemical engineering . Witkowitz. Thiscoke oven gas motor operatesa 150-kw. three-phase genera-tor by direct connection at aspeed of 160 r. p. m. The gasengine was constructed byBreitfeld, Danek & Co., ofPrag-Karolinenthel, Austria,Hungary, and the three-phasealternator by Ganz & Co., ofBudapest-Leubersdorfs, the fre-quency being 50 periods persecond, and the pressure 575volts. The earlier electric stationsoperated by gas engines sup-plied with producer gas werenot of the direct-connected type,but were belted to the dynamos as at tlie gas engine electricpower plant at Uster, near Zurich, Switzerland. A numberof gas producer systems are now in operation successfully inEurope and America, and there is every reason to believe thatduring the next decade the gas engine will occupy an im-portant place in the electric light and power stations through-out the world as the high efficiency of the entire installationcompares well with the best plants using other prime movers. Revolving=Hearth Roasting FIG. 3.—COKE 0\EX G.\S ENGINE ELECTRIC IL-\NT. structed on top of the producer in some cases and in theform of a tubular evaporator in larger installations. Thesteam is generated in the evaporator by taking advantage ofthe heat of the producer and of the gases, the firing of anindependent boiler being avoided. It is claimed by engineersfavoring this type of producer that it utilizes 80 per cent ofthe fuel and the grate is kept cool by passing the steam underthe same. It is also claimed that the suction gas producer canstart quickly from a part load to an excessive load, as thecarbon monoxide is formed and the steam provides the hydro- The development ni late years of so many nunuig propertiescontaining large quantities of comparatively low grade andrefractory ores, has created a demand for a furnace of largecapacity, in which such ores can be roasted preparatory tochemical or further igneous treatment. Heap and stall roasting and the hand reverberatory roastingfurnace
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmetallu, bookyear1902
